I’ve suddenly become unable to post replies on threads, although (if you are seeing this) I am apparently able to start new threads. When I attempt to post a reply, I get an error message that says “Unable to receive your submission at this time,” but I am apparently able to navigate around the site normally.

I don’t know what’s going on. I made an assumption about minimum characters, but was evidently wrong. I thought I remembered something about that, but there apparently isn’t a minimum.

Apparently you only need a single character. Spaces don’t count.

“Unable to receive your submission at this time,” sounds like a transient issue with communications and connectivity. Maybe the server burped or was too busy at that particular moment. (Wordorigins is not the only site hosted on the server.) In any case, I can’t replicate it.